Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	55787700000.00000
1981-01-01	56539400000.00000
1982-01-01	46883500000.00000
1983-01-01	36853000000.00000
1984-01-01	33302900000.00000
1985-01-01	30644500000.00000
1986-01-01	22294600000.00000
1987-01-01	24284400000.00000
1988-01-01	24525600000.00000
1989-01-01	25560000000.00000
1990-01-01	27995300000.00000
1991-01-01	25661700000.00000
1992-01-01	24363700000.00000
1993-01-01	19833100000.00000
1994-01-01	19665400000.00000
1995-01-01	22875300000.00000
1996-01-01	23871100000.00000
1997-01-01	26062700000.00000
1998-01-01	24020600000.00000
1999-01-01	27710300000.00000
2000-01-01	30926200000.00000
2001-01-01	29709300000.00000
2002-01-01	31368700000.00000
2003-01-01	38221800000.00000
2004-01-01	47390600000.00000
2005-01-01	51865100000.00000
2006-01-01	64620300000.00000
2007-01-01	81055200000.00000
2008-01-01	94065500000.00000
2009-01-01	64200500000.00000
2010-01-01	60164200000.00000
2011-01-01	66060100000.00001
2012-01-01	53545300000.00000
2013-01-01	52812900000.00000